diff options
| -rw-r--r-- | ports/samd/Makefile | 2 | ||||
| -rw-r--r-- | ports/samd/machine_wdt.c | 141 | ||||
| -rw-r--r-- | ports/samd/modmachine.c | 1 | ||||
| -rw-r--r-- | ports/samd/modmachine.h | 1 |
4 files changed, 145 insertions, 0 deletions
diff --git a/ports/samd/Makefile b/ports/samd/Makefile index e3d0d28f8..71a902a0a 100644 --- a/ports/samd/Makefile +++ b/ports/samd/Makefile @@ -97,6 +97,7 @@ SRC_C = \ machine_spi.c \ machine_timer.c \ machine_uart.c \ + machine_wdt.c \ main.c \ modutime.c \ modmachine.c \ @@ -155,6 +156,7 @@ SRC_QSTR += \ machine_spi.c \ machine_timer.c \ machine_uart.c \ + machine_wdt.c \ modutime.c \ modmachine.c \ modsamd.c \ diff --git a/ports/samd/machine_wdt.c b/ports/samd/machine_wdt.c new file mode 100644 index 000000000..c0fbfdbfb --- /dev/null +++ b/ports/samd/machine_wdt.c @@ -0,0 +1,141 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2020-2021 Damien P. George + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "py/runtime.h" +#include "modmachine.h" + +#include "sam.h" + +#define MIN_TIMEOUT 512 +#define MAX_TIMEOUT 16384 + +typedef struct _machine_wdt_obj_t { + mp_obj_base_t base; +} machine_wdt_obj_t; + +extern mp_int_t log2i(mp_int_t num); + +STATIC const machine_wdt_obj_t machine_wdt = {{&machine_wdt_type}}; + +STATIC void set_timeout(uint32_t timeout) { + // Set new timeout. Have to disable WDT first. + + // Confine to the valid range + if (timeout < MIN_TIMEOUT) { + timeout = MIN_TIMEOUT; + } else if (timeout > MAX_TIMEOUT) { + timeout = MAX_TIMEOUT; + } + + #if defined(MCU_SAMD21) + WDT->CTRL.reg = 0; + while (WDT->STATUS.reg & WDT_STATUS_SYNCBUSY) { + } + WDT->CONFIG.reg = log2i(timeout) - 3; + WDT->CTRL.reg = WDT_CTRL_ENABLE; + while (WDT->STATUS.reg & WDT_STATUS_SYNCBUSY) { + } + #elif defined(MCU_SAMD51) + WDT->CTRLA.reg = 0; + while (WDT->SYNCBUSY.reg & WDT_SYNCBUSY_ENABLE) { + } + WDT->CONFIG.reg = log2i(timeout) - 3; + WDT->CTRLA.reg = WDT_CTRLA_ENABLE; + while (WDT->SYNCBUSY.reg & WDT_SYNCBUSY_ENABLE) { + } + #endif +} + +STATIC mp_obj_t machine_wdt_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) { + enum { ARG_id, ARG_timeout, ARG_lock }; + static const mp_arg_t allowed_args[] = { + { MP_QSTR_id, MP_ARG_INT, {.u_int = 0} }, + { MP_QSTR_timeout, MP_ARG_INT, {.u_int = 5000} }, + }; + + // Parse the arguments. + mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; + mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); + + #if defined(MCU_SAMD51) + // Verify the WDT id. SAMD51 only, saving a few bytes for SAMD21 + mp_int_t id = args[ARG_id].u_int; + if (id != 0) { + mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("WDT(%d) doesn't exist"), id); + } + #endif + + // Start the watchdog (timeout is in milliseconds). + uint32_t timeout = args[ARG_timeout].u_int; + // Configure the WDT + #if defined(MCU_SAMD21) + + // Enable APBx clocks and GCLK clock + PM->APBAMASK.reg |= PM_APBAMASK_WDT; + GCLK->CLKCTRL.reg = GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK8 | GCLK_CLKCTRL_ID_WDT; + + #elif defined(MCU_SAMD51) + + // Enable APBx clocks and 1kHz clock + MCLK->APBAMASK.reg |= MCLK_APBAMASK_WDT; + OSC32KCTRL->OSCULP32K.bit.EN1K = 1; + + #endif + + set_timeout(timeout); + + return MP_OBJ_FROM_PTR(&machine_wdt); +} + +STATIC mp_obj_t machine_wdt_feed(mp_obj_t self_in) { + (void)self_in; + WDT->CLEAR.reg = 0xa5; + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_wdt_feed_obj, machine_wdt_feed); + +STATIC mp_obj_t machine_wdt_timeout_ms(mp_obj_t self_in, mp_obj_t timout_in) { + uint32_t timeout = mp_obj_get_int(timout_in); + + set_timeout(timeout); + + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_wdt_timeout_ms_obj, machine_wdt_timeout_ms); + +STATIC const mp_rom_map_elem_t machine_wdt_locals_dict_table[] = { + { MP_ROM_QSTR(MP_QSTR_feed), MP_ROM_PTR(&machine_wdt_feed_obj) }, + { MP_ROM_QSTR(MP_QSTR_timeout_ms), MP_ROM_PTR(&machine_wdt_timeout_ms_obj) }, +}; +STATIC MP_DEFINE_CONST_DICT(machine_wdt_locals_dict, machine_wdt_locals_dict_table); + +MP_DEFINE_CONST_OBJ_TYPE( + machine_wdt_type, + MP_QSTR_WDT, + MP_TYPE_FLAG_NONE, + make_new, machine_wdt_make_new, + locals_dict, &machine_wdt_locals_dict + ); diff --git a/ports/samd/modmachine.c b/ports/samd/modmachine.c index 852d10912..cabd6b9c5 100644 --- a/ports/samd/modmachine.c +++ b/ports/samd/modmachine.c @@ -159,6 +159,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = { { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&machine_spi_type) }, { MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&machine_timer_type) }, { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&machine_uart_type) }, + { MP_ROM_QSTR(MP_QSTR_WDT), MP_ROM_PTR(&machine_wdt_type) }, { MP_ROM_QSTR(MP_QSTR_idle), MP_ROM_PTR(&machine_idle_obj) }, { MP_ROM_QSTR(MP_QSTR_disable_irq), MP_ROM_PTR(&machine_disable_irq_obj) }, diff --git a/ports/samd/modmachine.h b/ports/samd/modmachine.h index b6da5e46f..61b26a1fa 100644 --- a/ports/samd/modmachine.h +++ b/ports/samd/modmachine.h @@ -36,5 +36,6 @@ extern const mp_obj_type_t machine_pwm_type; extern const mp_obj_type_t machine_spi_type; extern const mp_obj_type_t machine_timer_type; extern const mp_obj_type_t machine_uart_type; +extern const mp_obj_type_t machine_wdt_type; #endif // MICROPY_INCLUDED_SAMD_MODMACHINE_H |